Using the stairs instead of the elevator or other habits does result in weight loss!
Thursday, February 07, 2013
A 150-pound person burns about five calories per flight of stairs. If you walk the three flights up to your office in the morning and after lunch instead of taking the elevator, you will burn an additional 30 calories each day. Do that every day you work all year and you will burn over 7,200 additional calories. That means you can lose two pounds a year just by skipping the elevator!
quoted from an SP article